CNBC Daily Open: AI is carrying the weight of the U.S. market

Core Insights - Amazon has signed a significant $38 billion deal with OpenAI, providing access to its Amazon Web Services infrastructure, indicating a strong partnership in the AI sector [1] - OpenAI's shift to Amazon for cloud services marks a diversification from its previous reliance on Microsoft, suggesting potential preparations for an initial public offering [2] - Following the announcement, Amazon's stock surged to a record high, reflecting positive investor sentiment towards Big Tech, while the broader market showed mixed results [3] Company Developments - The $38 billion deal with OpenAI highlights Amazon's strategic positioning in the AI market and its capability to support high-demand AI models [1] - OpenAI's move to Amazon signifies a strategic shift in its operational dependencies, moving away from Microsoft and potentially enhancing its market independence [2] Market Reactions - Amazon's shares reached a record high following the announcement of the deal, indicating strong investor confidence in the company's future prospects [3] - Despite gains in major indices like the S&P 500 and Nasdaq, over 300 stocks in the broader market declined, suggesting a narrow focus of investor interest primarily on Big Tech [4]